Comparison of classic approach and sub-branch approach during sono-guided obturator nerve block

Comparison of classic approach and sub-branch approach during sono-guided obturator nerve block - sono-guided obturator nerve block:sub-branch approach

Status

Active, not recruiting

Phases

Phase 1

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000022716

Enrollment

Registered

2017-06-30

Start date

2019-01-17

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

bladder cancer

Interventions

Interventions: sub-branch approach A 22-gauge, 120-mm stimulating needle (Stimuplex insulated needle

D Plus B. Braun, Melsungen, Germany) attached to a nerve stimulator (Stimuplex HNS12

B. Braun, Melsungen, Germany) is advanced using an ultrasound in-plane approach from lateral to medial to position the needle tip at the fascia of posterior branch. The neurostimulation current starts

1.5% lidocaine + epinephrine 1:200,000) is slowly injected after negative aspiration, and we identify the separation of the adjacent muscles. The needle is then positioned at the fascia of anterior br

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: all patients anticipating transurethral resection of bladder tumors with American Society of Anesthesiologists physical status(ASA) I or II

Exclusion criteria

Exclusion criteria: patients with diabetes or peripheral neuropathy; motor or sensory deficits in the lower extremities, ASA greater than III, coagulation disorders, anticoagulant medication, known allergy to local anesthetics, contraindications for spinal anesthesia (infection at injection site, severe scoliosis or fusion operation), uncooperative patients and patients' refusal

Design outcomes

Primary

Measure	Time frame
success rate of sono-guided ONB with classic approach and sub-branch approach (evaluation periods: about 6 months)- obturator reflex grade(I-IV)	—

Countries

Asia(except Japan)

Contacts

Public ContactMi Geum Lee

Gachon University Gil Medical Center The Anesthesiology and Pain Medicine

mikeum2@gilhospital.com82-32-460-3636

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026